Hi. I'm Jon Jagger.
I help software teams improve their effectiveness.
I built cyber-dojo, the place teams practice programming.
I'm based in the UK.
I've worked in 22 countries.
If you don't like my work, I won't invoice you.
Hire me

...it is better to analyze in terms of doings or happenings than in terms of objects or static abstractions (quoting P.W. Bridgman)

And with this shift in time there occurs a shift in the entity of concern - from an object, a pattern of matter in space, to a behavior, a pattern of events in time. [R.W.Gerard]

Why do things stay the same?

How can we know the dancer from the dance? [William Butler Yeats]

Although we may identify the system by its functions, this is only a convenience, for the "real" identity lies in "the permanence of the relations among the component parts" - the "structure". (quoting Herbert Spencer).